Elevator pit protection device

Abstract

The utility model discloses an elevator pit protection device, which relates to the technical field of elevators and is arranged in an elevator shaft, a car doorway is arranged on the elevator shaft, a mounting base is fixedly mounted at the bottom of the elevator shaft, an anti-falling buffer column is fixedly mounted on the mounting base, and a lifting mechanism is arranged in the elevator shaft. The lifting mechanism comprises a threaded lead screw rotationally installed in the elevator shaft, a lead screw nut is in threaded connection with the threaded lead screw, a lifting frame body is fixedly installed on the lead screw nut, a linkage shaft is rotationally installed at the bottom of the threaded lead screw, a driving motor is fixedly connected to one end of the linkage shaft, and a protection mechanism is installed on the lifting frame body. A lifting guide rail is fixedly installed in the elevator shaft, and bevel gears are fixedly installed on the threaded lead screw and the linkage shaft. According to the elevator pit protection device, through cooperative use of the lifting mechanism and the protection mechanism, foreign matter can be prevented from falling down and injuring workers, and the risk of maintenance operation of the workers is reduced.

Description

Technical Field

[0001] This utility model relates to the field of elevator technology, specifically an elevator pit protection device. Background Technology

[0002] Elevators, as an indispensable vertical transportation tool in modern buildings, greatly facilitate people's daily lives and work. Driven by an electric motor, they suspend and pull a car via steel cables or belts, moving it back and forth vertically or at an incline within a shaft, thus enabling the rapid vertical movement of people or goods. Elevators are typically equipped with control panels, lighting, ventilation, and safety devices to ensure passenger comfort and safety. Their operating principle is precise and complex, involving multiple components such as electric drive, electrical control, guidance, and door systems, all of which require precise coordination to ensure smooth operation.

[0003] In modern buildings, elevator shafts are typically designed with a deep pit to facilitate maintenance work. However, during routine maintenance and repairs, workers must enter the pit to operate the equipment. A significant concern during this process is the potential for foreign objects to fall unexpectedly from the top of the elevator car. If this happens, the falling objects pose a serious safety threat to workers in the pit, as they could injure them. Therefore, an elevator pit protection device is proposed. Utility Model Content

[0004] The purpose of this invention is to provide an elevator pit protection device to solve the problem of workers being injured by falling objects at the bottom of the pit in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an elevator pit protection device, installed inside an elevator shaft, wherein a car door is provided on the elevator shaft, an installation base is fixedly installed at the bottom of the elevator shaft, an anti-fall buffer column is fixedly installed on the installation base, a lifting mechanism is provided inside the elevator shaft, the lifting mechanism includes a threaded screw rotatably installed inside the elevator shaft, a screw nut is threadedly connected to the threaded screw, a lifting frame is fixedly installed on the screw nut, a linkage shaft is rotatably installed at the bottom of the threaded screw, a drive motor is fixedly connected to one end of the linkage shaft, and a protective mechanism is installed on the lifting frame.

[0006] Preferably, a lifting guide rail is fixedly installed inside the elevator shaft, and helical gears are fixedly installed on both the threaded screw and the linkage shaft, with the helical gears meshing together in pairs.

[0007] Preferably, the output end of the drive motor is provided with a coupling, and the linkage shaft is fixedly installed at the output end of the drive motor through the coupling. The mounting base is provided with a hole, and the linkage shaft passes through the mounting base through the hole.

[0008] Preferably, a retainer is provided on the inner wall of the elevator shaft, the threaded screw is rotatably installed in the elevator shaft through the retainer, a slot is provided on the lifting frame, the screw nut is fixed on the lifting frame through the slot, a sliding groove is provided on the lifting frame, and the lifting frame is slidably installed on the lifting guide rail through the sliding groove.

[0009] Preferably, the protective mechanism includes a movable slide groove formed on the lifting frame, a sliding rod slidably installed in the movable slide groove, a protective cloth sheet fixedly installed on the sliding rod, a counterweight fixedly installed at the lower end of the protective cloth sheet, a steel wire rope fixedly installed at the upper end of the protective cloth sheet, a positioning shaft fixedly installed on the lifting frame, and a fixed pulley rotatably installed at the middle position of the positioning shaft.

[0010] Preferably, a bearing is provided at the middle position of the positioning shaft, and the fixed pulley is rotatably mounted at the middle position of the positioning shaft through the bearing.

[0011] Preferably, the sliding rod is slidably installed on the lifting frame via a movable groove, the protective cloth is slidably installed inside the lifting frame via the sliding rod, one end of the steel wire rope is fixed to the protective cloth, and the other end of the steel wire rope is fixed to the inner wall of the elevator shaft.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. In this application, after the drive motor starts, it drives the linkage shaft to rotate. Subsequently, the rotation of the linkage shaft causes the threaded screw to rotate. The rotational motion of the threaded screw is further converted into the reciprocating motion of the screw nut in the vertical direction. This vertical motion drives the lifting frame to move up and down. When the lifting frame reaches its upper limit position, it will be precisely aligned with the car door, thus facilitating workers to enter the elevator pit for maintenance and repair.

[0014] 2. In this application, during the upward movement of the lifting frame, the wire rope pulls the sliding rod to move along the movable slide rail. When the lifting frame reaches its highest point, the protective cloth sheet moves to the top position of the lifting frame. This protective cloth sheet has the function of blocking falling foreign objects, thereby effectively reducing the risks faced by workers during maintenance operations. During the downward movement of the lifting frame, the counterweight will pull the protective cloth sheet back to its initial position. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a partial structural schematic diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the lifting mechanism of this utility model;

[0018] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle;

[0019] Figure 5 This is a schematic diagram of the protective mechanism of this utility model;

[0020] Figure 6 This is a schematic diagram of the lifting mechanism of this utility model after it has been raised. The numbers in the diagram are: 1. Elevator shaft; 2. Car doorway; 3. Mounting base; 4. Anti-fall buffer column; 5. Lifting mechanism; 501. Lifting guide rail; 502. Lifting frame; 503. Threaded screw; 504. Drive motor; 505. Linkage shaft; 506. Helical gear; 507. Screw nut; 6. Protective mechanism; 601. Protective cloth sheet; 602. Sliding rod; 603. Counterweight; 604. Steel wire rope; 605. Movable slide; 606. Positioning shaft; 607. Fixed pulley. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figure 1 , Figure 2 and Figure 6 As shown, this utility model provides a technical solution for an elevator pit protection device, which is installed in an elevator shaft 1. The elevator shaft 1 has a car door 2, and an installation base 3 is fixedly installed at the bottom of the elevator shaft 1. An anti-fall buffer column 4 is fixedly installed on the installation base 3. A lifting mechanism 5 is provided in the elevator shaft 1, and a protective mechanism 6 is installed on the lifting frame 502. Through the cooperation of the lifting mechanism 5 and the protective mechanism 6, foreign objects can be prevented from falling and injuring workers, reducing the risk of workers' maintenance operations.

[0023] like Figure 2 , Figure 3 and Figure 4As shown, the lifting mechanism 5 includes a threaded screw 503 rotatably installed in the elevator shaft 1, a screw nut 507 threadedly connected to the threaded screw 503, a lifting frame 502 fixedly installed on the screw nut 507, a linkage shaft 505 rotatably installed at the bottom of the threaded screw 503, a drive motor 504 fixedly connected to one end of the linkage shaft 505, a lifting guide rail 501 fixedly installed in the elevator shaft 1, helical gears 506 fixedly installed on both the threaded screw 503 and the linkage shaft 505, and the helical gears 506 mesh together in pairs, a coupling is provided at the output end of the drive motor 504, and the linkage shaft 505 is fixedly installed at the output end of the drive motor 504 through the coupling, and a hole is opened on the mounting base 3, through which the linkage shaft 505 passes through the mounting base 3.

[0024] Specifically, after the drive motor 504 is started, it begins to perform its function, namely, driving the connected linkage shaft 505 to rotate. During the rotation of the linkage shaft 505, it further drives the threaded screw 503 to rotate accordingly. As the threaded screw 503 rotates, it causes the screw nut 507 to move vertically, i.e., up and down. This up-and-down movement drives the lifting frame 502 to move up and down, enabling it to rise and fall vertically. When the lifting frame 502 reaches the highest point of its travel, it is precisely aligned with the position of the car door 2. This alignment provides workers with a convenient passage, allowing them to easily enter the elevator pit to perform necessary maintenance work.

[0025] like Figure 2 , Figure 3 and Figure 5 As shown, the protective mechanism 6 includes a movable slide 605 opened on the lifting frame 502. A sliding rod 602 is slidably installed in the movable slide 605. A protective cloth 601 is fixedly installed on the sliding rod 602. A counterweight 603 is fixedly installed at the lower end of the protective cloth 601. A wire rope 604 is fixedly installed at the upper end of the protective cloth 601. A positioning shaft 606 is fixedly installed on the lifting frame 502. A fixed pulley 607 is rotatably installed at the middle position of the positioning shaft 606. A bearing is provided at the middle position of the positioning shaft 606. The fixed pulley 607 is rotatably installed at the middle position of the positioning shaft 606 through the bearing.

[0026] Specifically, when the lifting frame 502 begins to move upward, the wire rope 604 pulls the sliding rod 602 along the movable slide 605. As the lifting frame 502 continues to rise until it reaches its highest point, the sliding rod 602 moves the protective cloth 601 accordingly, eventually placing it at the top of the lifting frame 502. At this position, the protective cloth 601 effectively blocks and intercepts various foreign objects falling from a height, significantly reducing the risks and dangers that workers may face during maintenance work. Furthermore, during the downward movement of the lifting frame 502, the counterweight 603 functions, using appropriate tension to reset the protective cloth 601, ensuring it can provide protection again during the next lifting operation.

[0027] Working principle: When in use, the elevator car is controlled to move upwards to above the car door 2. After the elevator car moves upwards to above the car door 2, the drive motor 504 can be started. After the drive motor 504 is started, it will drive the linkage shaft 505 to rotate. After the linkage shaft 505 rotates, it will drive the threaded screw 503 to rotate. After the threaded screw 503 rotates, it will drive the screw nut 507 to move up and down. When the screw nut 507 moves up and down, it will drive the lifting frame 502 to move up and down. When the lifting frame 502 moves to the highest point, it will be aligned with the car door 2, making it convenient for workers to enter the elevator pit for maintenance work. Simultaneously, when the lifting frame 502 moves upward, the wire rope 604 pulls the sliding rod 602 along the movable slide groove 605. When the lifting frame 502 reaches its highest point, the protective cloth 601 moves to the top of the lifting frame 502. The protective cloth 601 can block falling foreign objects, reducing the risk to workers during maintenance. Simultaneously, when the lifting frame 502 moves downward, the counterweight 603 can pull the protective cloth 601 back to its original position. The protective cloth 601 is made of high-toughness fabric, such as certain synthetic fiber fabrics, which, after special treatment, can improve impact resistance and durability, making it suitable for preventing falling foreign objects. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An elevator pit protection device, installed inside an elevator shaft (1), wherein a car door (2) is provided on the elevator shaft (1), and an installation base (3) is fixedly installed at the bottom of the elevator shaft (1), and a fall-prevention buffer column (4) is fixedly installed on the installation base (3), characterized in that: The elevator shaft (1) is provided with a lifting mechanism (5). The lifting mechanism (5) includes a threaded screw (503) rotatably installed in the elevator shaft (1). A screw nut (507) is threadedly connected to the threaded screw (503). A lifting frame (502) is fixedly installed on the screw nut (507). A linkage shaft (505) is rotatably installed at the bottom of the threaded screw (503). A drive motor (504) is fixedly connected to one end of the linkage shaft (505). A protective mechanism (6) is installed on the lifting frame (502).

2. A pit protection device according to claim 1, characterised in that: The elevator shaft (1) is fixedly installed with a lifting guide rail (501), and helical gears (506) are fixedly installed on the threaded screw (503) and the linkage shaft (505), and the helical gears (506) mesh together in pairs.

3. A pit protection device according to claim 2, characterised in that: The output end of the drive motor (504) is provided with a coupling, and the linkage shaft (505) is fixedly installed at the output end of the drive motor (504) through the coupling. The mounting base (3) is provided with a hole, and the linkage shaft (505) passes through the mounting base (3) through the hole.

4. A pit protection device according to claim 3, wherein: The elevator shaft (1) is provided with a retainer on its inner wall. The threaded screw (503) is rotatably installed in the elevator shaft (1) through the retainer. The lifting frame (502) is provided with a slot. The screw nut (507) is fixed on the lifting frame (502) through the slot. The lifting frame (502) is provided with a sliding groove. The lifting frame (502) is slidably installed on the lifting guide rail (501) through the sliding groove.

5. A pit protection arrangement according to claim 4, characterised in that: The protective mechanism (6) includes a movable slide groove (605) opened on the lifting frame (502), a sliding rod (602) is slidably installed in the movable slide groove (605), a protective cloth piece (601) is fixedly installed on the sliding rod (602), a counterweight (603) is fixedly installed at the lower end of the protective cloth piece (601), a steel wire rope (604) is fixedly installed at the upper end of the protective cloth piece (601), a positioning shaft (606) is fixedly installed on the lifting frame (502), and a fixed pulley (607) is rotatably installed at the middle position of the positioning shaft (606).

6. A pit protection device according to claim 5, wherein: A bearing is provided in the middle of the positioning shaft (606), and the fixed pulley (607) is rotatably mounted in the middle of the positioning shaft (606) through the bearing.

7. A pit protection device according to claim 6, characterised in that: The sliding rod (602) is slidably installed on the lifting frame (502) through the movable slide groove (605). The protective cloth (601) is slidably installed inside the lifting frame (502) through the sliding rod (602). One end of the steel wire rope (604) is fixed to the protective cloth (601), and the other end of the steel wire rope (604) is fixed to the inner wall of the elevator shaft (1).

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